get a spray bottle,..fill with diesel fuel,..kerosine,..heatin oil,..spray block,heads rest your greasy parts couple times a day for week or 2,soak some brushes and scrub on it some,..bottle brushes down in holes,ect ect,...then,..take pressure washer to it or load up an take to car wash,..wont be perfect but better than putting dirty motor together!! 1 dollar diesel,..what 5 at car wash,..easy on budget!